Its rootable. Just make sure that if you want to unlock your bootloader as well in order to flash custom recoveries/ROMs that you DO NOT, I repeat, DO NOT, update to the OTA that will be waiting for you.
The stock software that comes when you purchase it (unless Verizon recently changed things) ends in MDK, and this one is unlockable and fully customizable. The OTA updates it to ME7 and this version is NOT unlockable, however it is rooted so you can still use root apps.
Samsung Galaxy S4 - Verizon
Nexus 7 32gb + Data
Always rooted, Always changing